CN110035364B

CN110035364B - Sound production screen

Info

Publication number: CN110035364B
Application number: CN201910431244.8A
Authority: CN
Inventors: 张探; 韩梅
Original assignee: Guangzhou Guoxian Technology Co Ltd
Current assignee: Guangzhou Guoxian Technology Co Ltd
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2020-10-27
Anticipated expiration: 2039-05-22
Also published as: CN110035364A

Abstract

The invention provides a sound production screen, which solves the problem that the strength of a display screen is weakened due to through holes in auxiliary devices below the display screen in the prior art. The sound emission screen includes: vibrating the flat plate; an exciter; and the vibration conduction piece is fixedly connected between the vibration flat plate and the exciter and comprises a contact part contacted with the vibration flat plate and a connecting part contacted with the exciter, and the sectional area of the contact part in the direction parallel to the vibration flat plate is larger than that of the connecting part in the direction parallel to the vibration flat plate.

Description

Sound production screen

Technical Field

The invention relates to the technical field of sound production equipment, in particular to a sound production screen.

Background

The screen sounding technology can omit the occupied space of a receiver on a display screen, and becomes a research hotspot for realizing full-screen display at present. The screen sound production principle is that a display screen and a structure in front are driven through an exciter, the display screen is used as a vibration flat plate, sound waves are generated by means of vibration, and then the sound waves are transmitted to human ears. Usually, the driver and the display screen must maintain enough contact area to ensure the sound production, however, the back of the display screen is usually provided with auxiliary devices to support the display screen, so that through holes are required to be formed on the auxiliary devices to avoid the driver to ensure the contact between the driver and the display screen, and the support strength of the auxiliary devices is reduced by the arrangement of the through holes, which results in the reduction of the strength of the display screen.

Disclosure of Invention

In view of the above, embodiments of the present invention are directed to providing a sound screen to solve the problem of the strength reduction of the display screen caused by the through hole on the auxiliary device below the display screen in the prior art.

The present invention provides a sound screen, comprising: vibrating the flat plate; an exciter; and the vibration conduction piece is fixedly connected between the vibration flat plate and the exciter and comprises a contact part contacted with the vibration flat plate and a connecting part contacted with the exciter, and the sectional area of the contact part in the direction parallel to the vibration flat plate is larger than that of the connecting part in the direction parallel to the vibration flat plate.

In one embodiment, the contact portion is sheet-like and the connection portion is rod-like.

In one embodiment, the contact part is symmetrical in center, the connecting part is a straight rod with a uniform cross section, and the axis of the connecting part passes through the center of the contact part.

In one embodiment, the exciter includes a vibration portion in contact with the connection portion, and the contact area of the contact portion with the vibration plate is larger than the contact area of the vibration portion with the connection portion and smaller than or equal to the surface area of the vibration plate near the contact portion.

In one embodiment, the vibration plate further comprises a support reinforcing layer, wherein the support reinforcing layer is located between the contact part and the vibration plate, or the support reinforcing layer is located on the surface of the contact part, which faces away from the vibration plate.

In one embodiment, the contact portion and the connection portion are of different materials.

In one embodiment, the material of the contact portion is polyester and the material of the connection portion is metal.

In one embodiment, the vibration plate includes a display screen, and the sound screen further includes an auxiliary device having a through hole, the auxiliary device being fixed to a surface of the display screen contacting the contact portion and covering the contact portion, and the connection portion passing through the through hole.

In one embodiment, the connecting portion and the wall of the through hole have a gap therebetween; and/or a gap is arranged between the contact part and the auxiliary device; and/or there is a gap between the actuator and the auxiliary device.

In one embodiment, the vibration plate includes a cover plate and a display panel fixed to a first surface of the cover plate, the first surface of the cover plate includes a bezel region not covered by the display panel, the exciter is fixed to a surface of the display panel facing away from the cover plate, and the contact portion is fixed to the bezel region.

According to the sound production screen provided by the invention, the vibration conduction piece is arranged and comprises the contact part contacted with the vibration flat plate and the connecting part contacted with the exciter, and the sectional area of the contact part in the direction parallel to the vibration flat plate is larger than that of the connecting part in the direction parallel to the vibration flat plate.

Drawings

Fig. 1 is a schematic structural diagram of a sound screen according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a sound screen according to a second embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a sound screen according to a third embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a sound screen according to a fourth embodiment of the present invention.

Fig. 5 is a block diagram of a display device according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a sound screen according to a first embodiment of the present invention. The sound production screen is suitable for electronic equipment with a display screen, such as a mobile phone, a television, a computer display, a display instrument and meter and the like. As shown in fig. 1, the sound screen includes a vibration plate 11, an exciter 12, and a vibration conductor 13 fixedly connected between the vibration plate 11 and the exciter 12. The vibration transmitter 13 includes a contact portion 131 contacting the vibration plate 11 and a connection portion 132 contacting the exciter 12, and the cross-sectional area of the contact portion 131 in the direction parallel to the vibration plate 11 is larger than the cross-sectional area of the connection portion 132 in the direction parallel to the vibration plate 11.

The vibration plate 11 serves to generate mechanical vibration as a sound source by being driven by the exciter 12. The vibrating plate 11 in the sound screen may be a display screen, a cover plate, a cabinet, or a separately provided plate-like structure dedicated to serving as a sound source.

The actuator 12 includes a piezoelectric ceramic unit actuator, a micro-vibration unit actuator, and the like, and the present invention is not limited to the specific structure of the actuator 12.

According to the sound screen provided by the embodiment, by providing the vibration conduction member 13, the vibration conduction member 13 includes the contact portion 131 contacting the vibration plate 11 and the connection portion 132 contacting the exciter 12, and since the cross-sectional area of the contact portion 131 in the direction parallel to the vibration plate 11 is larger than the cross-sectional area of the connection portion 132 in the direction parallel to the vibration plate 11, in this case, when the vibration plate 11 is a display screen, a through hole for avoiding the exciter 12 is formed in an auxiliary device below the display screen as long as the through hole can pass through the connection portion 132, and compared with a through hole which can pass through the contact portion 131 as needed, the aperture of the through hole is smaller, thereby reducing the influence on the supporting force of the auxiliary device and improving the reliability of the display screen.

In the sound screen shown in fig. 1, the specific shapes of the contact portion 131 and the connection portion 132 may be set as appropriate according to actual needs. For example, as shown in fig. 1, the contact portion 131 is a sheet-like shape, the connection portion 132 is a rod-like shape, and the rod-like shape refers to a member having a dimension in the longitudinal direction (longitudinal direction) that is much larger than a dimension in the lateral direction (perpendicular to the longitudinal direction). The rod-like member can be described by two main geometrical elements of the cross section and the axis of the rod. The cross-section is a section perpendicular to the length of the rod, and the axis is the line connecting the centers of the cross-sections. The cross-section is perpendicular to the rod axis. In general, the rod shape includes a straight rod having a straight axis and the same cross section, and a rod having a cross section of a variable size along the axis.

For example, the contact portion 131 may be a sheet having any regular shape such as a circular sheet, a rectangular sheet, or a rhombic sheet, or may be a sheet having irregular edges; the cross section of the rod-shaped connecting portion 132 may be any shape such as a circle, a rectangle, a trapezoid, and the like, which is not limited in the embodiment of the present invention. The sheet-shaped contact part 131 is beneficial to increasing the contact area with the vibrating plate 11 and improving the sound production effect; the rod-shaped connecting part 132 is beneficial to reducing the size of the through hole on the auxiliary device and reducing the influence of the through hole on the reliability of the display screen, namely, the reliability of the display screen is improved while a good sound production effect is ensured.

In one embodiment, referring to fig. 1, the contact portion 131 is centrosymmetric, for example, the contact portion 131 is a circular thin plate, the connecting portion 132 is a straight rod with a uniform cross section, and an axis of the connecting portion 132 passes through a center of the contact portion 131. Thus, the vibration on the contact portion 131 is more uniform, and the sound production effect is better.

When the area of the cross section of the contact portion 131 or the connection portion 132 in the direction parallel to the vibration plate 11 is not equal, for example, when the connection portion 132 has a trapezoidal bank structure, the area of the cross section of the connection portion 132 in the direction parallel to the vibration plate 11 is the maximum value of the cross-sectional area. When the contact portion 131 includes a plurality of sub-contact portions or the connection portion 132 includes a plurality of sub-connection portions, for example, the connection portion 132 includes three cylindrical connection rods, the area of the cross section of the connection portion 132 in the direction parallel to the vibration plate 11 refers to the sum of the cross sectional areas of the three sub-cylindrical connection rods in the direction parallel to the vibration plate 11.

In the sound screen shown in fig. 1, the materials of the contact portion 131 and the connection portion 132 are the same or different. In one embodiment, the contact portion 131 and the connection portion 132 are different in material. Different materials are used for the contact portion 131 and the connection portion 132, so that the contact area of the contact portion 131 can be increased as much as possible while the vibration conduction function is exerted, and the supporting force of the connection portion 132 can be improved.

For example, the contact portion 131 is made of polyester, and the connection portion 132 is made of metal. In this case, the vibration of the exciter 12 is transmitted to the vibration plate 11 through the contact portion 131 via the connecting portion 132, and the vibration plate 11 and the contact portion 131 vibrate in synchronization. For the contact part 131, on one hand, the vibration can be conducted, and on the other hand, the contact part can be used as a sounding membrane for adjusting the vibration frequency of the vibrating plate 11 to meet the requirement of human ears, so that the sounding effect is improved.

Fig. 2 is a schematic structural diagram of a sound screen according to a second embodiment of the present invention. As shown in fig. 2, the actuator 22 in the sound screen includes a vibration portion 220 for contacting with a load and driving the load to vibrate, the vibration portion 220 is specifically contacted with a connection portion 232, and the contact area of the contact portion 231 with the vibration plate 21 is larger than the contact area of the vibration portion 220 with the connection portion 232 and smaller than or equal to the area of the surface of the vibration plate 21 close to the contact portion 231.

The vibration portion 220 of the actuator 22 is a piezoelectric ceramic element actuator, for example, and the vibration portion 220 refers to a diaphragm, i.e., a multi-layer piezoelectric ceramic sheet, which is a member for driving the load structure to vibrate and generate sound by bending up and down without stopping with a change in applied voltage. Taking the micro-vibration unit exciter as an example, the vibration portion 220 is a suspended mass block, and is used for driving the load structure to vibrate and generate sound by vibrating up and down under the action of the magnetic circuit system.

In one embodiment, the vibration part 220 and the vibration conductor 23 are integrally formed, i.e. the vibration conductor 23 is directly implemented as part of the exciter 22. Of course, the vibration conductor 23 may be separately prepared, or the connection portion 232 may be integrally formed with the vibration portion 220 and the contact portion 231 may be separately prepared.

According to the sound screen provided in the present embodiment, the contact area between the contact portion 231 and the vibration plate 21 is larger than the contact area between the vibration portion 220 and the connection portion 232 of the actuator 22, so that the sound screen as shown in fig. 2 increases the vibration area of the vibration plate 21 and improves the sound intensity compared to a structure in which the vibration portion 220 of the actuator 22 is directly contacted with the vibration plate 21.

In the sound screen shown in fig. 2, as shown in fig. 2, the contact area of the contact portion 231 with the vibration flat plate 21 is equal to the area of the surface of the vibration flat plate 21 near the contact portion 231. Thus, on one hand, by increasing the vibration area of the vibration plate 21, the vibration uniformity and the sound production intensity are improved; on the other hand, the local vibration of the vibration plate 21 is converted into the global vibration, so that the risk of breakage of the vibration plate 21 caused by the local vibration is avoided.

In one embodiment, the display device further includes a support reinforcing layer 24, as shown in fig. 2, the support reinforcing layer 24 is located between the contact portion 231 and the vibration plate 21. Alternatively, the support reinforcing layer 24 may be located on the surface of the contact portion 231 facing away from the vibrating plate 21. The supporting and reinforcing layer 24 is used to provide a supporting function for the vibrating plate, and is used as a sound wave conduction channel to improve the sound production effect.

The contact area of the support reinforcing layer 24 and the contact portion 231 is equal to the area of the surface of the contact portion 231 near the support reinforcing layer 24. The supporting reinforcing layer 24 includes a thin steel sheet, a copper foil, a polyimide film, a high temperature resistant polyester film, and the like. In one embodiment, the supporting and reinforcing layer 24 is a copper foil, in which case the supporting and reinforcing layer 24 can also perform a good heat dissipation function.

Fig. 3 is a schematic structural diagram of a sound screen according to a third embodiment of the present invention. As shown in fig. 3, the vibration plate of the sound screen is the display screen 31, and the contact portion 331 is fixed to the lower surface of the display screen 31. In this case, the sound screen further includes an auxiliary device 35 having a through hole 350 on the basis of the structure of the sound screen shown in fig. 2, the auxiliary device 35 is fixed to the surface of the display screen 31 contacting the contact portion 331 and covers the contact portion 331, and the connection portion 332 passes through the through hole 350.

The auxiliary device 35 covering the contact portion 331 mentioned here means that the auxiliary device 35 is in contact with or not in contact with the contact portion 331, and the orthographic projection of the contact portion 331 falls entirely on the auxiliary device 35.

In one embodiment, the auxiliary device 35 has a gap with the contact 331; and/or, a gap is formed between the wall of the through hole 350 and the connecting part 332. This has the advantage that, on the one hand, the influence of the through-hole 350 on the vibrations of the connection 332 can be avoided; on the other hand, the gap can be used as a heat dissipation channel, which is beneficial to the dissipation of heat generated by mechanical vibration.

At the same time, the exciter 32 may be fixed to the surface of the auxiliary device 35 facing away from the vibrating plate 31, for example, the exciter 32 may be fixed to the lower surface of the auxiliary device 35 by means of optical adhesive or by means of screws. Alternatively, a support member may be provided on the surface of the exciter 32 facing away from the vibration plate 31 to support and fix the exciter 32, in which case, as shown in fig. 3, a gap is provided between the exciter 32 and the auxiliary device 35, which corresponds to a further opening for the heat dissipation channel, so as to better dissipate the heat generated by the mechanical vibration.

According to the sound screen provided by the embodiment, the contact portion 331 ensures a large contact area, and the connection portion 332 reduces the opening of the auxiliary device 35, thereby improving the reliability of the display screen while ensuring a good sound effect.

It should be understood that the auxiliary device 35 shown in fig. 3 can also be applied to the sound screen shown in fig. 2, and will not be described in detail here.

Fig. 4 is a schematic structural diagram of a sound screen according to a fourth embodiment of the present invention. As shown in fig. 4, the vibration plate 41 in the sound screen includes a cover 411 and a display panel 412 fixed to a first surface of the cover 411, the first surface of the cover 411 includes a bezel area Q not covered by the display panel 412, the exciter 42 is fixed to a surface of the display panel 412 facing away from the cover 411, and the contact portion 431 is fixed to the bezel area Q.

In this embodiment, the specific shapes of the contact portion 431 and the connection portion 432 may be set as appropriate according to actual needs. For example, the contact portion 431 is in the form of a sheet, and the connection portion 432 is in the form of a rod, such as a straight rod having an equal cross section or an L-shaped rod. The contact portion 431 may be a sheet having any regular shape such as a circular sheet, a rectangular sheet, a rhombic sheet, or the like, or may be a sheet having irregular edges; the cross section of the rod-shaped connecting portion 432 may be any shape such as a circle, a rectangle, a trapezoid, etc., which is not limited in the embodiment of the present invention. The sheet-shaped contact part 431 is beneficial to increasing the contact area with the cover plate 411 and improving the sound production effect; the rod-shaped connecting portion 432 is advantageous for reducing the occupied space to adapt to the structural clearance as much as possible, which is advantageous for reducing the thickness of the product.

In one embodiment, referring to fig. 4, the contact portion 431 is centrosymmetric, the connecting portion 432 is a straight rod with a uniform cross section, and the axis of the connecting portion 432 passes through the center of the contact portion 431. Thus, the vibration at the contact portion 431 is more uniform, and the sound generating effect is better.

In the sound screen shown in fig. 4, the contact portion 431 and the connection portion 432 are made of the same material, for example, both metal, so that vibration can be conducted and sufficient mechanical strength can be obtained.

In the present embodiment, as shown in fig. 4, the side surface (i.e., the surface parallel to the vibration direction of the vibration part) of the exciter 42 is fixed to the edge area of the lower surface of the display panel 412 near the earpiece region, and the vibration part 420 of the exciter 42 is located on the side away from the display panel 412, so that the vibration direction of the vibration part 420 is perpendicular to the display surface of the display panel 412. The connecting portion 432 is a straight rod having a rectangular cross section, and one side surface of the connecting portion 432 is fixedly connected to the vibrating portion 420. The contact portion 431 is a rectangular thin plate fixed to the earpiece region of the first surface of the cover 411.

According to the sound production screen that this embodiment provided, can utilize vibration conduction spare directly to transmit mechanical vibration to the earphone region, be favorable to improving vocal effect.

In one embodiment, the surface of the connection part 432 fixed to the vibration part 420 is further fixedly connected to the display panel 412. Thus, the mechanical vibration can be transmitted to the cover 411 and the display panel 412 at the same time, and compared with the case of transmitting the mechanical vibration to the cover 411 separately, the vibration intensity is larger and the sound production effect is better.

In one embodiment, the vibration part 420 and the vibration conductor 43 are integrally formed, i.e. the vibration conductor 43 is directly implemented as part of the exciter 42. Of course, the vibration transmitter 43 may be separately prepared.

Fig. 5 is a block diagram of a display device according to an embodiment of the invention. As shown in fig. 5, the display device 500 includes a sound screen 510, an audio processing module 520 and an audio signal driving circuit 530 electrically connected to the exciter, which are provided in any of the above embodiments. The audio processing module 520 is configured to output an analog audio signal to the audio driving circuit 530; the audio signal driving circuit 530 is configured to drive the exciter in the sound screen 510 to generate vibration energy after receiving the analog audio signal output by the audio processing module 520, wherein the vibration energy is transmitted to the vibration plate through the vibration transmitter, and the sound signal is output through the vibration plate.

In this embodiment, the audio processing module 520 may receive the audio file output by the processor 540 and output an analog audio signal, where the audio file may be an audio file in various encoding formats, such as audio files in MP3, WMA, WAV, ASF, ACC, and the like.

The invention also provides electronic equipment which comprises the display device. An audio processing module in an electronic device includes: the audio codec is connected with a processor of the electronic equipment, receives an audio file output by the processor and decodes the audio file into a digital audio signal. The digital-to-analog converter converts the digital audio signal into an analog audio signal, i.e., an audio signal represented in the form of a current, a voltage, or an electric charge.

After the audio signal driving circuit receives the analog audio signal output by the audio processing module, the analog signal bears sound information, the analog signal is processed and converted into a current signal through a circuit on a printed circuit board in the electronic equipment, at the moment, the voice information is borne on the current signal, the driving circuit transmits the current signal to the exciter, so that the exciter conducts sound information through vibration under the action of the current, a vibration flat plate fixedly connected with the exciter is driven to vibrate together and release, and a user can hear the voice information.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.

Claims

1. A sound screen, comprising:

a vibrating plate comprising a display screen;

an exciter;

the vibration conduction piece is fixedly connected between the vibration flat plate and the exciter and comprises a contact part contacted with the vibration flat plate and a connecting part contacted with the exciter, and the sectional area of the contact part in the direction parallel to the vibration flat plate is larger than that of the connecting part in the direction parallel to the vibration flat plate; and

and an auxiliary device having a through hole, the auxiliary device being fixed to a surface of the display screen contacting the contact portion and covering the contact portion, the connection portion passing through the through hole.

2. A sound screen according to claim 1, wherein the contact portion is laminar and the connecting portion is rod-shaped.

3. A sound screen according to claim 2, wherein the contact portion is centrosymmetric, the connecting portion is a straight rod of uniform cross-section, and the axis of the connecting portion passes through the center of the contact portion.

4. The sound screen of claim 2, wherein the actuator includes a vibrating portion in contact with the connecting portion, and an area of contact between the vibrating portion and the vibrating plate is larger than an area of contact between the vibrating portion and the connecting portion and smaller than or equal to an area of a surface of the vibrating plate near the contacting portion.

5. The sound screen of claim 4, further comprising a support reinforcement layer between the contact portion and the vibration plate; or

The support reinforcing layer is located the contact part deviates from the surface of the vibrating plate.

6. A sound screen according to claim 1, characterised in that the material of the contact portion and the connection portion is different.

7. The sound screen of claim 6, wherein the contact portion is made of polyester and the connection portion is made of metal.

8. The sound screen of claim 1, wherein there is a gap between the connection portion and a wall of the through hole; and/or

A gap is arranged between the contact part and the auxiliary device; and/or

A gap is provided between the actuator and the auxiliary device.

9. The sound screen of claim 1, wherein the vibration plate includes a cover plate and a display panel secured to a first surface of the cover plate, the first surface of the cover plate including a bezel area not covered by the display panel, the exciter being secured to a surface of the display panel facing away from the cover plate, the contact being secured to the bezel area.